JP3017452U - Flame-retardant plywood and mixed liquid permeation device therefor - Google Patents

Abstract

(57) [Summary] [Purpose] A flame-retardant plywood that can achieve the flame-retardant performance specified by a public institution, and a mixed liquid permeation device for the flame-retardant plywood. Provided is a flame-retardant plywood having any of the above configurations, and a mixed liquid permeation device having a novel structure used for permeating a predetermined mixed liquid. [Structure] A hard solution containing ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, magnesium oxide, calcium phosphate, and lanthanum chloride in an ether alone or in an aqueous solution containing about 10% of ethers and alcohols. The combustible substance is mixed at a predetermined mixing ratio, and the mixed liquid having a concentration of the flame retardant substance of about 30 to 50% is permeated and fixed, and at least about 20 to 30
A flame-retardant plywood made by laminating and integrating a number of wood veneers that have achieved a weight increase of around 10% with a heat-resistant adhesive, according to the laminated structure.

Description

[Detailed description of the device]

[0001]

[The purpose of the device]

 This invention is made of a flame-retardant plywood having a flame-retardant property by a flame-retardant test specified by a public organization such as Japanese Industrial Standards (JIS) and fire prevention regulations, and a mixed liquid used in manufacturing the flame-retardant plywood. Regarding infiltration equipment, it is indispensable to provide flame-retardant plywood with a new structure that is far cheaper and superior in flame-retardant performance compared to the previous ones, and to provide the flame-retardant plywood at low cost. An object of the present invention is to provide a mixed solution permeation device having a novel structure that enables extremely efficient penetration of a mixed solution.

[0002]

[Prior art]

 With the promotion of domestic demand expansion policies, construction momentum related to public works investment, including housing construction, has been strong, and new facility structures such as civic centers and shopping centers have been established not only in large cities but also in local municipalities. As they began to appear one after another, not only people who had the opportunity to move into new homes and new condominiums, but also the general public unknowingly spent a lot of time in newly constructed public facilities and commercial buildings. With the increase in width, the opportunity to expose yourself to new building materials has become extremely large.

In consideration of these circumstances, the building-related laws and regulations require new building materials, especially new building materials used in highly public places, and new building materials around parts that handle firearms such as kitchens, to a greater extent than before. It imposes strong performance regulations, that is, flame-retardant or non-flammable regulations, and it can be said that it is possible to strengthen it in the future but not weaken it. In order to meet this flame retardant or non-flammability regulation, new building materials such as laminated decorative plastic sheets with relatively rich decorative properties and new plastic coating materials are hardly applicable, and Since it is not allowed to use the decorative plywood of the above, most are limited to new inorganic building materials such as natural stone and artificial stone, ceramic tiles, and metal sheets lined with inorganic materials. As a result, there are considerable restrictions in terms of making ingenuity in creating the indoor environment. Therefore, at the request of the owners and designers, if they dare to adopt wood-based building materials for the flame-retardant regulations, they will be far more expensive than new inorganic building materials. Therefore, it is necessary to select those that have been certified as flame-retardant plywood or wood langes that have been subjected to flame-retardant treatment.

At present, the reason why such wood-based building materials subjected to flame-retardant treatment have become extremely expensive is that the difficulty or complexity of the flame-retardant treatment has a great influence. It is considered that Most of the flame-retardant treatments that have been adopted so far employ a method of injecting a flame-retardant material, mainly metal fine powder or other non-combustible substance, between wood fibers by means of pressure reduction or pressure. The equipment required for depressurization or pressurization is extremely large and expensive, and the processing capacity is limited for a large facility, making it unsuitable for mass production. The cost was set in consideration of capital investment and processing capacity, and the manufacturing unit price was inevitably high.

The applicant of the present invention is trying to apply the technique in various fields against the background of the permeation technique cultivated over many years in the heterogeneous field of dyeing. As a result of repeated trial and error, with the opportunity to proceed with development and research, the specificity of the cell structure of wood was applied, and the prescribed chemical liquid was permeated and fixed at a prescribed ratio under normal temperature and pressure. , A flame-retardant plywood with a structure with flame-retardant performance that exceeds the specified performance, and in the process of obtaining the flame-retardant plywood, a liquid mixture that is convenient for efficiently permeating the wood-flame-retardant material with a flame-retardant substance We succeeded in developing and putting the device into practical use, and the details of its configuration will be explained below.

[0006]

[Constitution of device]

 The flame-retardant plywood of the present invention basically has the following configuration. That is, by heating and stirring ethers alone or in an aqueous solution containing about 10% of ethers and alcohols together for a predetermined time, ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, Flame retardant substances consisting of magnesium oxide, calcium phosphate, and lanthanum chloride were mixed at a mixing ratio of approximately 30, 10, 10, 20, 20, 6, 2, 2 (%), and the flame retardant concentration In the above, about 30 to 50% of the mixed liquid is permeated and fixed, and the wood veneer has achieved a weight increase of at least about 20 to 30% in the weight ratio in the drying stage (drying with a water content of about 10%). Are made into a flame-retardant plywood in which the fiber directions thereof are orthogonal to each other by the number corresponding to the laminated structure and are laminated and integrated via a heat-resistant adhesive.

The wood veneer is a grain-like lauan veneer and a grain-like lauan veneer that has been ground to a thickness of about 2 to 3 mm, which has been conventionally adopted as a constituent material of plywood. Depending on the circumstances, it may be made into a decorative veneer other than Lauan wood.), And the mixed liquid in which the flame-retardant substance is melted in a predetermined ratio is stored under normal conditions (normal temperature, normal pressure). Continue spraying directly on these wood veneers placed underneath for a predetermined period of time, and at the weight ratio in the drying stage (drying with a water content of about 10%), the wood veneers are at least about the weight before treatment. The wood veneer that has been subjected to a flame-retardant treatment through the conventional drying process after being subjected to a permeation treatment until a weight increase of around 20 to 30% is reached is usually used. , A laminated structure in which the grain-shaped ones are on the outermost side. Flame-retardant wood veneer and heat-resistant adhesive are integrated under heating and pressure to form a flame-retardant plywood of odd structure such as 5 ply and 7 ply (in the case of flame-retardant decorative plywood, the outermost plywood). Either or both of the flame-retardant veneer sheets are formed into a laminate of flame-retardant decorative veneers other than lauan material, or an integrated flame-retardant decorative plywood).

As the flame retardant substance, at least each substance consisting of a combination of ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, magnesium oxide, calcium phosphate, and lanthanum chloride is required, and their mixture is required. As for the melting ratio in the liquid, as a standard, a ratio of about 30, 10, 10, 20, 20, 6, 2, 2 (%) is sequentially realized, and it is common sense. Ammonium bromide 10 is not allowed to increase or decrease as appropriate within a specific range, and if, for example, there are special circumstances, such as the case where the target wood material has the property of being slightly perishable, etc. Adjusting the proportion of% appropriately to a proportion of 20 to 30% is also part of the design change that can be considered. The eluate is used for magnesium oxide, calcium phosphate, and lanthanum chloride.

As a solvent (penetrating agent), it has a function of promoting the water solubility of the above-mentioned flame retardant substance (increasing its solubility in water), and at the same time acts on the cells of the wood material to produce the bit (cell wall). A hole in the sap passage that has a valve that regulates water movement and normally remains closed after felling.) And is harmless to the human body. In addition to the condition that it should be as cheap as possible, the dissolving power increases as the temperature rises, and the evaporation rate is equal to that of water.Even if the temperature of water is raised to increase the dissolving power, only that evaporates first. Ethers or alcohols that do not change the solvent concentration and thus have a relatively low molecular weight that has the property of increasing its dissolving power with increasing temperature, such as ether solvents Is diethylene glycol Monoethyl ether (carbitol C ₆ H ₁₄ O ₃ ) is used, and as the alcohol solvent, propylene glycol (propandiform C ₃ H ₈ O ₂ ) or triethylene glycol (C ₆ H ₁₄ O ₄ ) is used. To be selected.

The combination ratio of ethers or alcohols as a solvent is first of all relatively low so that the kind of wood material to be subjected to the flame-retardant treatment, for example, a little discoloration such as lauan wood is not a problem. Depending on the conditions, such as whether it is wood or a high-quality wood that should not be discolored, or a high-quality wood that has a dense structure that is difficult to penetrate, and toxicity is allowed. In other words, it is necessary to determine the degree, that is, even if it is economical, the solvent with a lower boiling point becomes more toxic. Since it is harmless to the human body but does not cause any problems even if some toxicity remains, it is necessary to use only ether solvents alone. As for the decorative veneer laminated on the outermost side, the function as a solvent should be given the highest priority and the toxicity should be reduced as much as possible even at the cost of some economy. A mixed solvent prepared by mixing solvents will be adopted.

The amount of the above-mentioned solvent that can achieve a ratio of about 10% with respect to water is a predetermined amount of flame retardant substances (ie, ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, magnesium oxide). , Calcium phosphate, and lanthanum chloride) are mixed and stirred in water and heated for a required time by steam heating, the water temperature rises to about 103 to 105 ° C due to the mixture, and the solvent and difficult The combustible substance is melted in water in an extremely homogeneous state to form a predetermined mixed liquid.

In this way, the flame-retardant substance is adjusted so that the total amount thereof is an optimal ratio in the range of about 30 to 50% of the aqueous solution to obtain a mixed liquid, and the mixed liquid (at this point, the flame-retardant substance is used). The above-mentioned heating for melting the chemical substance is stopped, and it is left in a standing state and naturally falls to normal temperature.) The heating and stirring are stopped, and the temperature is naturally lowered, so that the final temperature does not fall below 60 ° C. While controlling the heating appropriately, the mixture is sprayed onto the entire surface of the target wood veneer in a shower mode immediately after the heating and stirring are stopped, and the flame-retardant substance melted at a predetermined ratio is the wood-based material. The weight of the wood veneer penetrated and settled into the wood, and the weight of the wood veneer (the weight of the wood material in a dry state with a water content of about 10%) was about 20 to 30% by weight relative to the untreated wood veneer. When the permeation state that achieves weight increase in the front and rear is achieved For a period of time (depending on the material and material thickness, as well as on the solvent used), the continuous injection process is usually continued for about 20 to 24 hours, and then the same drying process as before is applied. Achieving flame-retardant wood veneer. The mixed liquid permeation device useful for effectively realizing flame retardancy of the wood veneer is also included in the present invention as a device related to the flame retardant plywood of the present invention.

[0013]

[Other related ideas]

 The mixed liquid permeation device related to the flame-retardant plywood of the present invention basically has the following configuration. That is, the mixed liquid permeation device included in the present invention includes a moving basket body capable of accommodating a large number of wood veneers of a predetermined size in an overlapping manner in the front-rear direction, and one or more moving basket bodies. The opening and closing closed container that has the injection pipe inside and the mixed liquid tank with the heating part is formed on the outside, and the lower part of the opening and closing closed container for heating. In a mixed solution recovery tank with a steam pipe and an ether alone or in an aqueous solution containing about 10% of ethers and alcohols together, the mixture is heated and stirred for a predetermined time to give ammonium phosphate and ammonium bromide. A flame-retardant substance consisting of um, boric acid, borax, ammonium chloride, magnesium oxide, calcium phosphate, and lanthanum chloride is mixed with about 30, 10, 10, 20, 20, 6, 2, 2 (%). It is mixed in a total proportion, and is composed of a mixed liquid having a flame retardant substance concentration of about 30 to 50%.

Then, the injection pipe in the open / close-type closed container is installed in either the mixed liquid tank with a heating unit formed outside the closed container or the mixed liquid recovery tank with a steam pipe for heating arranged in the lower part of the closed container. In addition to being selectively connected, a structure was adopted in which a pump for circulating the mixed liquid was placed between the injection pipe, the mixed liquid tank with the heating part, and the mixed liquid recovery tank with the steam pipe for heating. Ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, in an aqueous solution containing about 10% of ethers alone or a combination of ethers and alcohols formed in a mixed liquid tank with a heating unit, Flame-retardant substance consisting of magnesium oxide, calcium phosphate, and lanthanum chloride mixed in at a mixing ratio of approximately 30, 10, 10, 20, 20, 6, 2, 2 (%). Then, the mixed liquid of which the concentration of the flame retardant substance is about 30 to 50% is injected from the injection pipe through the pump to the inside of the openable closed container, the moving basket inside the wood veneer surface, and the heating steam pipe. The mixed solution permeation device included in the present invention is realized by circulating the mixed solution recovery tank with the attached liquid, and then circulating the mixed solution recovery tank in the cycle to the injection pipe again. Hereinafter, an embodiment of the mixed liquid permeation device of the present invention having a typical configuration will be specifically described based on the entire front view of FIG. 7 and the perspective views of the moving baskets of FIGS. 8 and 9. To

[0015]

Embodiment 1 As can be understood from the front view of FIG. 8, the mixed solution permeation device of the present invention comprises an openable closed container 1, an injection pipe 2 piped in the closed container, and a closed container 1. Mixture tank 3 with a heating unit, which is attached to the outside, pump 4 for circulating the mixture solution, the same driving motor 5, pipe 6 for circulating the mixture solution, mixture tank 7 with a steam pipe for heating, and an open-close seal. A moving basket 8 or 9 housed inside the container 1, which is formed by being heated and agitated in the mixed liquid tank 3 with a heating unit, which is not shown in the drawing, inside the openable closed container 1 and inside the moving basket body 8 or 9. Wood veneers W1, W1, ... and W2, W2, ... Each surface, mixed solution recovery tank 7 with a steam tube for heating, and the mixed solution essential to this invention, which is circulated in the cycle leading to the injection pipe 2 again, That is, ethers alone or By heating and stirring for a predetermined time in an aqueous solution containing about 10% of tellurium and alcohols in combination, ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, magnesium oxide, calcium phosphate, and chloride chloride. Flame retardant substance is mixed in a mixing ratio of about 30,10,10,20,20,6,2,2 (%), and the concentration of the flame retardant substance is about 30 to 50%. It is composed of liquid and.

In the permeation treatment step, the target wood veneers W1, W1, ... And W2, W2 ,. 8 or 9, the moving baskets 8 or 9 that are housed so as to be overlapped with each other are hung up, and the temperature drops to 60 ° C or less from the nozzle of the injection pipe 2 in the closed container 1 The temperature-controlled mixed liquid is sprayed under pressure in a shower manner so that the mixed liquid is evenly supplied to the wood veneers W1, W1, ... and W2, W2. This processing step is performed in a dry state (a wood veneer W1, W1, ... And a dried veneer having a water content of about 10%) after a predetermined drying step. W2, W2, ...) is the abbreviation of the weight before processing. The temperature continues to continue until the weight increase of about 20 to 30% is achieved, and in the injection process, the temperature of the mixed liquid is, for example, below the openable closed container 1. Collect the collected liquid in the recovery tank 7 in which the steam pipes 71, 71, ... Provided, and appropriately control the heating of the mixed liquid through the steam while detecting the temperature of the mixed liquid with a sensor, It is carried out by a circulation system in which it is sent to the aerosol.

The moving basket body 8 is a wood veneer having a grain shape W1, W1, ... And laminated between the wood veneers W2, W2 ,. , A number of wood veneer boards W1, W1, etc., which are integrated and are usually formed in a square slightly larger than 900 mm and have a thickness of 2 to 3 mm, are collectively housed in an overlapping manner in the front-rear direction, and are also transferred. The moving basket 9 is formed in a rectangular shape slightly larger than 900 × 1800 mm and has a thickness of 2 to 3 mm. The wooden veneers W2, W2, ... As shown in the figure, the container is formed in a lattice shape by an angle member, and the lattice-shaped frame lid portion 81 or 91 on the upper surface is openable and closable and has a wooden structure inside. After packing the veneer, close it and put it on the lid. The hoist M1 of the traveling crane M is hung up and stored in the openable closed container 1, and after the permeation treatment for a predetermined time is completed, the lid 11 of the closed container 1 is opened and lifted. Although it has not been installed, the wood veneers W1, W1, ... and W2, W2, ..., which are still in a wet state after being penetrated with the flame retardant substance, are lifted up by the traveling crane M while being put inside. It will be moved to the next step, which is the publicly known and previously known dryer, and it will be used as it is for dry curing.

The mixed solution is heated and stirred for a predetermined time in an aqueous solution containing about 10% of ethers alone or a combination of ethers and alcohols in the mixed solution tank 3 with a heating unit, to thereby obtain phosphoric acid. Flame-retardant substances consisting of ammonium, ammonium bromide, boric acid, borax, ammonium chloride, magnesium oxide, calcium phosphate, and lanthanum chloride are approximately 30, 10, 10, 20, 20, 6, 2, 2 (%). In order to obtain a mixed liquid with a flame retardant concentration of approximately 30 to 50%, the valve 33 at the bottom of the mixed liquid tank 3 with a heating unit is closed to mix the substance with a predetermined ratio in water. After being heated to 103 to 105 ° C. in the same heating unit (not shown), the valve 33 is opened and the butterfly valve 61 of the circulation pipe 6 is switched, and When 62 is closed and the pump 4 for circulating the mixed liquid is operated by the drive motor 5, the mixed liquid returns from the sending pipe 31 to the pump 4, the return pipe 32, and the mixed liquid tank 3 with a heating unit. In this cycle, the mixture is surely stirred, and after performing this step for about 10 minutes to obtain the desired mixture, the butterfly valve 61 is switched and the valve 34 of the return pipe 32 is closed to pump. 4 is still operated, the mixed liquid is sent out to the injection pipe 2, and the wood veneers W1, W1, ... And W2, W2 ,.

The mixed liquid that has flowed down in the openable closed container 1 is collected in a mixed liquid recovery tank 7 with a heating steam pipe, and heated to approximately 60 ° C. in the steam pipes 71, 71, .... While maintaining the controlled state, the mixed liquid is circulated again from the pump 4 in the cycle of the mixed liquid circulation pipe 6 and the open / closed closed container 1, and the wood veneer W1, W1, ... for about 20 to 24 hours. And W2, W2, ... Continue to infiltrate and fix the mixed solution. After that, the operation of the mixed liquid permeation device of the present invention is stopped, the lid 11 of the openable closed container 1 is opened, the moving baskets 8 and 9 are lifted by the hoist M1, and the moving crane M is moved.

Thus, the wood veneers W1, W1, ... And W2, W2 ,. The wood veneer drying method that has been adopted in, for example, a drying treatment step such as a method in which dry air is mixed with steam at a temperature of about 125 ° C. at an appropriate ratio is used to obtain a dried state of about 10% in water content. Wood veneers W1, W1, ... And W2, W2, ... , ... are prepared in a number corresponding to the application, for example, 5 or 7 layers, and are combined so that their fiber directions are orthogonal to each other, and the above heat-resistant adhesive B is used. The so-called conventional plywood manufacturing process of applying, pressurizing, and heat curing After that, the flame-retardant plywood W of this invention such as a 5-ply flame-retardant plywood W shown in the enlarged cross-sectional view of the main part of FIG. 10 or a 7-ply flame-retardant plywood W not shown is realized. It is something.

The heat-resistant adhesive B is an addition-condensation type phenolic resin, which is excellent in water resistance, chemical resistance, aging resistance and the like, and has a heat resistance of 150 to 180 ° C. Resin is the most suitable, and about 20 parts of formaldehyde (methanal) is added as a curing agent. In addition, because formaldehyde as a curing agent generates formalin gas when heated, hexamethylenetetramine (urotropin) crystallized by adding aqueous ammonia is used to prevent it, and heat resistance is reduced. For the purpose of enhancing the property, zirconium oxide (ZrO ₂ ), zirconium carbide (ZrC), and tantalum carbide (TaC) are mixed at a ratio of 3: 1: 1 by 5%.

[0022]

[Operation effect]

 The flame-retardant plywood of the present invention having the above-mentioned structure is obtained by mixing a solvent (a penetrant) and a flame-retardant substance in a predetermined ratio with water, heating and stirring the mixture to obtain a homogeneous mixed liquid, and simply By simply controlling the temperature so that the temperature does not drop below 0 ° C, the wood veneer undergoes flame-retardant treatment at room temperature without any conventional pressurization or depressurization. This is an extremely simple and economical flame-retardant treatment method that makes it possible to compare with the conventional pressurization or depressurization method, and a calculation by the instructing researcher at the Yamagata Prefectural Industrial Technology Center estimated that the equipment cost was 1/3. ~ 1/4, that is, tens of millions to hundreds of millions of yen in the pressurizing and depressurizing devices that have been used up to now, whereas the device of the present invention has a scale of about 10 million yen, and more specifically, 12 mm About 1/5 to 1/10 in equipment that produces 300 pieces of Nissan with flame-retardant plywood Therefore, it is possible to reduce the final product price to around 3000 to 4000 yen, which is about 1/3 to 1/4 of the price of flame-retardant plywood currently attached to 10,000 to 20,000 yen. There is also a report that it is possible, and it has been found that it is an extremely excellent flame-retardant plywood.

The technical background that makes flame-retardant treatment possible with these simple equipments is that the liquid mixture unique to the present invention, which has not been seen in the past, in particular, the solvent (penetrating agent) in a predetermined ratio, is essential. Bits (cell wall pores) of wood veneer (assembly of cell chambers partitioned by cell walls) that remain closed and do not accept the flame retardant solution. If they are closed or heated or dried after cutting The organs that close more strongly and block the movement of sap from the cell chambers are left open naturally, facilitating the penetration and fixation of the flame retardant substance solution in the mixture into the wood veneer cell chambers. It is expected that this is due to

In this way, the flame-retardant plywood of the present invention made of wood veneer that achieved a weight increase of about 20 to 30 is a flame-retardant test result in accordance with JIS A 1321 Flame-retardant Class 3 regulations. In the document (September 17, 1992, Settlement No. 1518 Akita Prefectural Industrial Materials Testing Center Director Certification), the performance test results shown in Table 1 are shown, and the test is shown in FIG. Fig. 2 shows the exhaust temperature / smoke amount curve of the sample NO.1, Fig. 2 shows the exhaust temperature / smoke amount curve of the sample NO.2, and Fig. 3 shows the exhaust temperature of the sample NO.3. The smoke and smoke amount curves are as shown respectively, demonstrating that the flame retardancy above the specified value has been achieved.

[0025]

[Table 1]

In addition, the test result document of the flame retardancy test in accordance with the provisions of Article 63, Paragraph 2 of the Fire Prevention Ordinance (October 30, 1992, Prediction (Trial) No. 5 Tokyo Fire Department Fire Chief The results are also shown in Table 2, and the exhaust temperature / smoke amount curve diagram of test sample No. A in that test is shown in Fig. 4, and the exhaust gas of test sample No. B is shown in Fig. 5. A temperature / smoke amount curve diagram is shown in Fig. 6, and an exhaust temperature / smoke amount curve diagram of test body No. C is shown in Fig. 6, respectively. Wood veneer subjected to flame retardant treatment by the treatment method of the present invention. However, it has been proved that the specified flame retardant performance defined by public institutions can be reliably achieved.

[0027]

[Table 2]

With respect to these flame retardance, the flame-retardant substance fixed in the wood veneer is heated from the outside to cause thermal decomposition, and becomes a non-combustible substance (gas, etc.) such as ammonia, carbon dioxide and water. While covering the surface of the wood veneer to obstruct the supply of oxygen and deprive the heat of dissolution to inhibit the temperature rise, flame retardant substances such as lanthanum chloride, borax, ammonium chloride, etc. Depending on the time reaction, for example, it reacts with 2NH ₄ cl + B ₂ O ₃ → 2NB + 2Hcl + 3H ₂ O to produce NB ₂ having a melting point of 3000 ° C., and at the same time, zirconium oxide (ZrO ₂ ) ZrC), and in the case of a tantalum carbide (TaC) was added, further, reacted with _{7Zr + 3B 4 C + B 2} O 3 → 7Zr B 2 + 3CO, which also refractory (30 The Zr B ₂ of 0 ° C.), further _{3Mg (OH) 2 + 2NH 4} cl → Mg 3 N 2 + 6H 2 O + 2Hcl of reacting with similarly Mg ₃ N ₂ respectively produce the outer refractory material, Zr (SO _{4) 2} (Zirconium sulfate) alone is heated to 380 ° C. or higher, and high melting point (2700 ° C.) ZrO ₂ and Mg (OH) ₂ (magnesium hydroxide) also have high melting point (2852 ° C.) when heated to 350 ° C. or higher. It is expected that the flame retardant substances such as MgO ₂ are heated and changed to contribute to the flame retardancy of the wood veneer.

Further, when the mixed liquid permeation device included in the present invention is used, the infiltration treatment of the mixed liquid into the wood veneer, which is an essential component of the present invention, is carried out extremely economically and reliably. In particular, as shown in the embodiment, the grain-shaped wood veneer to be laminated and combined and the grain-shaped wood veneer are housed in the dedicated moving cages 8 and 9, respectively, and the moving cages 8 and 9 are 9 It is of course constructed so that it can be hung and stored in the openable closed container 1 and that the moving baskets 8 and 9 can be sent to the next drying process as they are. In addition to having the characteristics that it can be carried out, the subsequent steps can be carried out smoothly, and it can be provided more economically and cheaply, which is very useful for the spread and expansion of the flame-retardant plywood of this invention. It will be done.

As mentioned above, the flame-retardant plywood of the present invention and the mixed liquid infiltration apparatus therefor do not require any forced infiltration means such as pressurization and depressurization as in the prior art. Due to the action of the unique mixed solution, the flame-retardant substance permeates and establishes relatively easily in and around the wood veneer cell chamber under normal temperature and pressure (normal conditions), and it has the performance that meets the standard. Since it is possible to realize plywood, it is possible to use flame-retardant plywood that has not been popular because it is expensive so far, and it can be used in all directions, making it suitable for all buildings, especially those with high publicity. It is expected that it will be highly adopted to protect the lives and property of the people, while being easily adopted and contributing to the creation of a quaint environment.

[Brief description of drawings]

[Fig. 1] Attached to the flame retardancy test report (Settlement No. 1518, Akita Prefectural Industrial Materials Testing Center Director certification, dated September 17, 1992) in accordance with the regulations for Class 3 flame retardancy. It is an exhaust temperature and smoke amount curve diagram of sample No. 1.

FIG. 2 is a graph of the exhaust temperature / smoke amount curve of Sample No. 2.

[Fig. 3] Similarly, it is an exhaust temperature / smoke amount curve diagram of Sample No. 3.

[Fig. 4] Test result document of flame retardancy test in accordance with the provisions of Article 63, Paragraph 2 of the Fire Prevention Ordinance (October 30, 1992,
Prediction (trial) No. 5 Tokyo Fire Department Fire Department Chief Fire Department General Manager Certification
FIG. 3 is an exhaust temperature / smoke amount curve diagram of the test body No. A attached to FIG.

FIG. 5 is an exhaust temperature / smoke amount curve diagram of the test body number B.

FIG. 6 is a curve diagram of the exhaust temperature and smoke amount of test sample No. C.

FIG. 7 is a front view of the mixed solution permeation device of the present invention.

FIG. 8: A moving basket 8 for accommodating a grain-shaped veneer.
FIG.

FIG. 9 is a moving basket 9 for accommodating a grain-like wood veneer.
FIG.

FIG. 10 is an enlarged sectional view of an essential part showing the laminated structure of the flame-retardant plywood of the present invention.

[Explanation of symbols]

 1 Open-close type sealed container 11 Same lid part 2 Injection pipe 3 Mixing liquid tank with heating part 31 Same sending pipe 32 Same returning pipe 33 Same sending pipe valve 34 Same returning pipe valve 4 Pump for circulating mixed liquid 5 Drive motor 6 Mixing liquid circulation pipe 61 Same butterfly valve 62 Same switching valve 63 Same overhaul pipe 7 Mixing liquid recovery tank with steam pipe for heating 71 Steam pipe 8 Moving basket 81 Same lattice frame lid 9 Moving basket 91 Same lattice Frame cover W Flame-retardant plywood of this invention W1 Same grain wood veneer W2 Same grain wood veneer B Heat resistant adhesive

Claims (4)

[Scope of utility model registration request] 1. Ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride by heating and stirring for a predetermined time in an ether alone or in an aqueous solution containing about 10% of ethers and alcohols together. , Magnesium oxide, calcium phosphate and lanthanum chloride,
It is mixed in a mixing ratio of 20, 20, 6, 2, 2 (%),
At the concentration of the flame-retardant substance, a mixed solution of about 30 to 50% is permeated and fixed, and the weight ratio in the drying (drying with a water content of about 10%) is at least about 20 to
Characterized by making the wood veneers that have achieved a weight increase of around 30%, the fiber directions of which are orthogonal to each other by the number corresponding to the laminated structure, and laminated and integrated with a heat resistant adhesive. And flame-retardant plywood. 2. The flame-retardant plywood according to claim 1, wherein the alcohol content in the aqueous solution is set to an optimum value within the range of about 0 to about 30% in terms of the ratio of ethers. 3. A heat-resistant adhesive is a zirconium oxide, a zirconium carbide, a phenol-based resorcin resin,
The flame-retardant plywood according to any one of claims 1 and 2, wherein about 20 parts by weight of tantalum carbide and formaldehyde added with ammonia water are added as a curing agent. 4. A moving basket body capable of accommodating a large number of wood veneers of a predetermined size in an overlapping manner in the front-rear direction, and a size capable of accommodating one or more moving basket bodies. An injection pipe is provided in the opening and closing, an openable closed container in which a mixed liquid tank with a heating unit is formed outside, and a mixed liquid recovery tank with a heating steam pipe at the bottom of the openable closed container, Ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, magnesium oxide, phosphoric acid is heated by stirring for a predetermined time in an aqueous solution containing about 10% of ethers alone or a combination of ethers and alcohols. Flame-retardant substances consisting of calcium and lanthanum chloride are approximately 30, 10, 1
0, 20, 20, 6, 2, 2 (%) is mixed, and the concentration of the flame retardant substance is about 30 to 50%. , A mixed solution tank with a heating unit formed outside the closed container, and
Selective communication with any one of the mixed liquid recovery tanks with heating steam pipes arranged at the bottom of the closed container, and the recovery of mixed liquid tanks with injection pipes and heating units and heating steam pipes. A pump for circulating the mixed solution is arranged between the tank and the tank, and the mixed solution is formed in the mixed solution tank with a heating unit in an aqueous solution containing about 10% of ethers alone or a combination of ethers and alcohols. , Ammonium phosphate, ammonium bromide, boric acid, borax, ammonium chloride, magnesium oxide, calcium phosphate, and lanthanum chloride, the flame-retardant substance is about 30, 10,
A mixed liquid mixed in a mixing ratio of 10, 20, 20, 6, 2, 2 (%) and having a concentration of the flame retardant substance of about 30 to 50% is opened and closed by an injection pipe through a pump. 4. The circulation in the closed container, the surface of the veneer wood veneer surface of the moving basket, the mixed liquid recovery tank with a steam pipe for heating, and the injection pipe again. 4. When manufacturing the flame-retardant plywood, the mixed liquid permeation device used for permeating and fixing the mixed liquid into the wood veneer at a predetermined ratio.